I'll try and get a close to the same Kv and let her rip!!! Of course this
would be an outrunner experiment for now.

Quote:

Originally Posted by jfinch

Flyboy, just be sure to wind to the same Kv and fill the stator slots with wire.

I have found though (this is totally antadotal) that on very high Kv outrunners the Y terminated motors are more stable then the deltas but I wonder if it has more to do with the ESC then the motor. But for modest Kv (900 - 1800) I've not noticed any real difference between Y and delta and will wind based on the wire I have available.

Thanks Steve but I'll do the test anyway thanks. You can keep
your books as I've seen enough myself to do the tests.

Books are not always right:
"
The description on the Aveox site includes a big mistake: the oversimplified text claims that Kv doubles delta vs wye. This is simply not true. Kv increases as sqrt3, it is not just theory but measurements result too.
I agree with Aveox in the claim that wye - considering proper load - slightly better in efficiency.
"
Most motors I see coming out of China which of course include some of your bretheren motor makers like Hacker, et all are mostly terminating Wye. Take a newbie in a factory and try and teach him wye versus delta termination. Guess which one will win?

p.s. When I speak of max current I mean max current a motor can take. Yes this will be past the max eta of any motor but for example a motor wound with 2T of 16G/wye wire and a motor wound with 4T of 18G wire/delta the delta will carry more max current than the wye. As for any motor that stays within it's current carrying capacity delta vs wye is a moot discussion and only relates to Kv.

Quote:

Originally Posted by sneu

Delta winds are easier--after making just a few motors I am pretty sure I am right. With low turn Y motors you have to deal with a rather massive bundle of wire.

Thanks Steve but I'll do the test anyway thanks. You can keep
your books as I've seen enough myself to do the tests.

Books are not always right:
"
The description on the Aveox site includes a big mistake: the oversimplified text claims that Kv doubles delta vs wye. This is simply not true. Kv increases as sqrt3, it is not just theory but measurements result too.
I agree with Aveox in the claim that wye - considering proper load - slightly better in efficiency.
"
Most motors I see coming out of China which of course include some of your bretheren motor makers like Hacker, et all are mostly terminating Wye. Take a newbie in a factory and try and teach him wye versus delta termination. Guess which one will win?

p.s. When I speak of max current I mean max current a motor can take. Yes this will be past the max eta of any motor but for example a motor wound with 2T of 16G/wye wire and a motor wound with 4T of 18G wire/delta the delta will carry more max current than the wye. As for any motor that stays within it's current carrying capacity delta vs wye is a moot discussion and only relates to Kv.

Come back when you have been to school! The text books were written by people that have just a bit more knowledge and experience than you

I enjoyed reading all the input about the Wye versus Delta theories, many good points were made. However, to fulfill my promise that I made when I started the thread, I think it's time to steer this thread back on track to it's original purpose, which is to ask questions specifically pertaining to the use of Scorpion Motors and Speed Controllers.

For those of you that have been waiting for the 30mm motors, they are now in stock! Woo-Hoo! I just got back from the RCX show a few minutes ago, and we had a great time. Now that the show is over, I will have to take some time to post the motors up on our website. It looks like I have a BUNCH of prop testing to do!

I have tested the Axi 2212/26 and found it produced ~940g thrust at slightly higher rpm (7050rpm) with that prop. It needed a lot more input power though (169W) so one can only assume that this Thrust 10 is a far better made and more efficient motor than an Axi (yeah, right!). If however we take the Thrust 10 figures with the necessary grains of salt - the Axi will actually power your aircraft better!

The Scorpion 2215/22 produces numbers which are comparable with those for the Axi 2212/26, so, yes, there is a Scorpion which will do the job.

I have tested the Axi 2212/26 and found it produced ~940g thrust at slightly higher rpm (7050rpm) with that prop. It needed a lot more input power though (169W) so one can only assume that this Thrust 10 is a far better made and more efficient motor than an Axi (yeah, right!). If however we take the Thrust 10 figures with the necessary grains of salt - the Axi will actually power your aircraft better!

The Scorpion 2215/22 produces numbers which are comparable with those for the Axi 2212/26, so, yes, there is a Scorpion which will do the job.

Am I correct in thinking you are saying that PA are lying about the Thrust 10's performance figures?

I can't say that definitively, but I would just be surprised if the Thrust 10 were a far more "efficient" motor than an Axi. If it can get 7000rpm/900g from 140W, when an Axi needs ~160-170W, that indicates that the Thrust 10 is a lot more efficient.

I am only skeptical because I have seen too many "optimistic" thrust figures from manufacturers and distributors but, if you can prove to me that the Thrust 10 really is that much better than an Axi, I'm ready to be impressed.